Comment # 12 on bug 1167388 from Takashi Iwai

(In reply to Wilman Darnasutisna from comment #11)
> this is right repo?
> 
> zypper ar
> https://download.opensuse.org/repositories/Kernel:/HEAD/standard/Kernel:HEAD.
> repo
> 
> but i don't see kernel-default for 5.6 in YaST

The OBS repo can be easily added via obs:// prefix, e.g.
  zypper ar obs://Kernel:/HEAD/standard

But the easiest way would be to just grab kernel-default.rpm from
  http://download.opensuse.org/repositories/Kernel:/HEAD/standard/x86_64/

and install the rpm file directly via zypper.